package cn.wfy.run;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public  class Ping {

    public  static  boolean ping(String ipAddress)  throws Exception {
        int  timeOut =  3000 ;   // 超时应该在3钞以上
        boolean status = InetAddress.getByName(ipAddress).isReachable(timeOut);      //  当返回值是true时，说明host是可用的，false则不可。
        return status;
    }

    public  static  void ping02(String ipAddress)  throws Exception {
        String line =  null;
        try {
            Process pro = Runtime.getRuntime().exec("ping " + ipAddress);
            BufferedReader buf =  new BufferedReader( new InputStreamReader(
                    pro.getInputStream()));
            while ((line = buf.readLine()) !=  null){
                System.out.println(new String(line.getBytes(),"Unicode"));
                System.out.println((line));}
        }  catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
    }

    public  static  boolean ping(String ipAddress,  int pingTimes,  int timeOut) {
        BufferedReader in =  null;
        Runtime r = Runtime.getRuntime();   //  将要执行的ping命令,此命令是windows格式的命令
        String pingCommand = "ping " + ipAddress + " -n " + pingTimes    + " -w " + timeOut;
        try {    //  执行命令并获取输出
            System.out.println(pingCommand);
            Process p = r.exec(pingCommand);
            if (p ==  null) {
                return  false;
            }
            in =  new BufferedReader( new InputStreamReader(p.getInputStream()));    //  逐行检查输出,计算类似出现=23ms TTL=62字样的次数
            int connectedCount = 0;
            String line =  null;
            while ((line = in.readLine()) !=  null) {
                connectedCount += getCheckResult(line);
            }    //  如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真
            return connectedCount == pingTimes;
        }  catch (Exception ex) {
            ex.printStackTrace();    //  出现异常则返回假
            return  false;
        }  finally {
            try {
                in.close();
            }  catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    // 若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.
    private  static  int getCheckResult(String line) {   //  System.out.println("控制台输出的结果为:"+line);
        Pattern pattern = Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)",    Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(line);
        while (matcher.find()) {
            return 1;
        }
        return 0;
    }
    public  static  void main(String[] args)  throws Exception {
        String ipAddress = "192.168.6.206";
//        System.out.println(ping(ipAddress));
        ping02(ipAddress);
        System.out.println(ping(ipAddress, 1, 1));
    }
}